What does sound look like?

3 minutes

Is it possible to see sound? Yes, but it takes some crafty photographic wizardry

The concept of ‘seeing sound’ might seem preposterous, but when you consider that sound is just compressed air travelling in waves, the idea becomes a bit more logical. The real trick is capturing air flow in a way that makes it perceptible to the human eye. Through some clever tricks, scientists are able to do just that using a technique called Schlieren flow visualisation, which is used to study everything from heat and sound to aerodynamics and the spread of disease.

Producer: Adam Cole

Video by NPR’s Skunk Bear

Video/Life Stages

Harlem’s over-55s synchronised swimming team thinks ageing is better in the pool

4 minutes

ORIGINAL
Video/Astronomy

When we look for aliens, why do we always find ourselves staring back?

5 minutes

Video/Demography & Migration

The island where 50 million crabs roam free and refugees are trapped in limbo

21 minutes

Essay/Quantum Theory

Quantum common sense

Despite its confounding reputation, quantum mechanics both guides and helps explain human intuition

Philip Ball

Video/Cosmology

The Sun – our steady, reliable companion – tells a very different story up close

4 minutes

Idea/Physics

The idea of creating a new universe in the lab is no joke

Zeeya Merali

Video/Physics

The mathematics of music means piano strings can never be in perfect harmony

4 minutes

Essay/Computing & Artificial Intelligence

fAIth

The most avid believers in artificial intelligence are aggressively secular – yet their language is eerily religious. Why?

Beth Singler

Idea/Biology

Bad mothers and why they make a difference to cheetah survival

Anne Hilborn